/*
 * CCVisu is a tool for visual graph clustering
 * and general force-directed graph layout.
 * This file is part of CCVisu.
 *
 * Copyright (C) 2005-2011  Dirk Beyer
 *
 * CCVisu is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * CCVisu is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with CCVisu; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Please find the GNU Lesser General Public License in file
 * license_lgpl.txt or http://www.gnu.org/licenses/lgpl.txt
 *
 * Dirk Beyer    (firstname.lastname@uni-passau.de)
 * University of Passau, Bavaria, Germany
 */
package org.sosy_lab.ccvisu.readers;

import java.io.BufferedReader;

import org.sosy_lab.ccvisu.graph.GraphData;
import org.sosy_lab.ccvisu.graph.Relation;
import org.sosy_lab.common.LogManager;

/**
 * Initialize an empty Relation and do nothing otherwise.
 */
public class ReaderDataGraphAUX extends ReaderDataGraph {

  public ReaderDataGraphAUX(LogManager logger, BufferedReader reader) {
    super(logger, reader);
  }

  @Override
  protected Relation readTuples() {
    return new Relation();
  }

  @Override
  public void read(GraphData graph) {
    // Do nothing, but still this method must be overridden.
    // Otherwise, graph.vertices will be wiped by the superclass' read().
  }
}
